Gray cable with a 1/2-inch diameter round five-pin polarized DIN or MIDI-type connector on one end and three two-conductor mini-phone plugs on the other end (2 x 3.5 mm & 1 x 2.5 mm). A gray ribbon cable approximately 1 5/8 in. wide and approximately 72 in. long the end of that cable is terminated in a blue Amphenol 57F-36 Centronics-type plug. 225F-A34-5 D6 socket.